HCS12 datasheet(263/452 Pages) FREESCALE

263 / 452 page

Glossary

S12CPUV2 Reference Manual, Rev. 4.0

Freescale Semiconductor

263

Operation:

Description:

Shifts all bits of memory location M one place to the left. Bit 0 is loaded from

the C status bit. The C bit is loaded from the most significant bit of M. Rotate

operations include the carry bit to allow extension of shift and rotate

operations to multiple bytes. For example, to shift a 24-bit value one bit to

the left, the sequence ASL LOW, ROL MID, ROL HIGH could be used where

LOW, MID and HIGH refer to the low-order, middle and high-order bytes of

the 24-bit value, respectively.

ROL

Rotate Left Memory

ROL

b7 – – – – – – b0

CCR Details:

HIN

––––

∆∆∆∆

N: Set if MSB of result is set; cleared otherwise

Z: Set if result is $00; cleared otherwise

V: N

⊕ C = [N • C] + [N • C] (for N and C after the shift)

Set if (N is set and C is cleared) or (N is cleared and C is set);

cleared otherwise (for values of N and C after the shift)

C: M7

Set if the MSB of M was set before the shift; cleared otherwise

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

ROL opr16a

ROL oprx0_xysp

ROL oprx9,xysp

ROL oprx16,xysp

ROL [D,xysp]

ROL [oprx16,xysp]

EXT

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

75 hh ll

65 xb

65 xb ff

65 xb ee ff

65 xb

65 xb ee ff

rPwO

rPw

rPwO

frPwP

fIfrPw

fIPrPw

rOPw

rPw

rPOw

frPPw

fIfrPw

fIPrPw

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